Abstract: The apparatus includes a high frequency, high voltage generator, a therapeutic instrument for applying an electric current to a patient, a compound electrical power and control cable connected between the generator and the instrument, and a switch for selectively connecting at least one signal current conductor in the cable to a therapeutic current conductor in the cable to complete a circuit through an activating device for controlling the action of the generator. The cable includes a multiple strand bare therapeutic current conductor wire and preferably two single strand wires with film coatings of low voltage insulation, all of the wires being enclosed in a protective sheath of high voltage insulation. A high voltage is impressed on all of the wires but the voltage differential is very small so that the bare conductor is adequately insulated from the others by the film coatings, with a resulting savings in weight and cost of wire and insulation and improved flexibility.

Abstract: A method and apparatus for the automatic testing of electronic equipment in which a general purpose digital computer is programmed for the equipment to be tested to generate appropriate stimulus waveforms for application to the equipment to be tested and for the measurement and evaluation of the waveforms responsively generated by the equipment tested. The computer directly controls the point-by-point generation of the analog stimulus waveforms by a plurality of analog to digital and analog to synchro converters, the application of the stimulus waveforms to selected leads of the unit to be tested, and the application of the response waveforms to a selected measurement circuit for conversion to digital form for subsequent evaluation by the computer against programmed standards.